Samsung WA48H7400AP Service Manual Download Page 1

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WASHING MACHINE (TOP-LOADING)

CONTENTS

SERVICE

Manual

WASHING MACHINE
TOP-LOADING TYPE

Basic Name : WA48H7400AP

(WA-7000HA PJT)

Basic Code :

WA45H7000AP/A2

Model Name :

WA50M7450AP

WA50M7450AW

(WA-7400M PJT)

Model Code :

WA50M7450AP/A4

WA50M7450AW/A4

1. Safety Instructions

2. Features and Specifications

3. Disassembly and Reassembly

4. Troubleshooting

5. PCB Diagram

6. Wiring Diagram

7. Reference

Summary of Contents for WA48H7400AP

Page 1: ...ic Name WA48H7400AP WA 7000HA PJT Basic Code WA45H7000AP A2 Model Name WA50M7450AP WA50M7450AW WA 7400M PJT Model Code WA50M7450AP A4 WA50M7450AW A4 1 Safety Instructions 2 Features and Specifications 3 Disassembly and Reassembly 4 Troubleshooting 5 PCB Diagram 6 Wiring Diagram 7 Reference ...

Page 2: ...ssembly and reassembly 9 3 2 Standard disassembly drawings 10 4 Troubleshooting 19 4 1 Error modes 19 4 2 Corrective actions for each error code 23 4 3 The installation for leveling 27 5 PCB diagram 28 5 1 Main PCB 28 5 2 Detailed Manual for Connector and Relay Terminal Part Main PCB 29 5 3 Sub PCB 30 5 4 Detailed Manual for Connector Terminal Part Sub PCB 31 6 Wiring diagram 31 6 1 Wiring diagram...

Page 3: ...disconnect the power plug before servicing 4 Failing to do so may result in a risk of electric shock Do not allow consumers to connect several appliances to a single power outlet at the same time 4 There is a risk of fire due to overheating When removing the power cord make sure to hold the power plug when pulling the plug from the outlet 4 Failing to do so may damage the plug and result in fire o...

Page 4: ...akage AFTER SERVICING Check the wiring 4 Ensure that no wire touches a rotating part or a sharpened part of the electrical harness Check for any water leakage 4 Perform a test run for the washing machine using the standard course and check whether there is any water leakage through the floor section or the pipes Do not allow consumers to repair or service any part of the washing machine themselves...

Page 5: ...not press a control button using a sharp tool or object 4 This may result in electric shock or damage to the product WHILE SERVICING When wiring a harness make sure to seal it completely so no liquid can enter 4 Make sure that they do not break when force is exerted Check if there is any residue that shows that liquid entered the electric parts or harnesses 4 If any liquid has entered into a part ...

Page 6: ...utlet and measure the insulation resistance between the power plug and the grounding wire of the washing machine The value must be greater than 10MΩ when measured with a 500V DC Megger Check whether the washing machine is level the floor with respect to the original position of the washing machine prior to service By doing this now will reduce for the need of customer dissatisfaction and redo call...

Page 7: ...ewer repairs Mist Shower A separate nozzle has been adopted that sprays water equally so that the rinse cycle is effective even with a small amount of water VRT Vibration Reduction Technology This Samsung washer performs smoothly at top spin speeds minimizing noise and vibration Self Clean Tub Cleaning cycle Clean your drum with one button This Pure Cycle is specially designed to remove detergent ...

Page 8: ...ON Inches cm A Height 43 9 111 5cm B Width 27 0 68 6cm C Height with Door open 58 1 147 6cm D Depth 29 3 74 4cm WATER PRESSURE 20 116psi 137 800kPa WEIGHT 64kg 141 1 lb CAPACITY 5 0cu ft POWER CONSUMPTION WASHING 120V 700W SPIN 120V 400W DRAIN 120V 80W SPIN REVOLUTION 800rpm C B A D ...

Page 9: ...al Heater VRT Yes Yes Pulsator material STS STS Max rpm Max spin speed 800 1 100 Mist Shower Yes Yes Motor DD DD Design Color Inox Neat White Neat White Main display 18 88 18 88 Jog Dial Chrome Chrome LED color Ice blue Ice blue Door Lid TC Tempered Tinted glass Tempered Tinted glass Easy door Yes Yes Top Cover Steel EGI Painting Steel EGI Painting Energy MEF cf kWh cycle 2 06 2 66 WF gal cycle cf...

Page 10: ...IONS Item Item Name Code No Remark HANGER HOSE DC61 00224A Default USER MANUAL DC68 03776E Default CABLE TIE 6501 000121 Default ASSY CAP V W DC97 18313A Default Note Customer can purchase Water supply drain hoses and assy leg support from a service center ...

Page 11: ...Tub 16 Fixer screw 5 Motor 1 Balance 5 Damper 2 Damper friction 1 Double ended spanner 10mm 17mm Replaced by box driver Leg Vice pliers A Tool for protecting empty turning of bolt or abrasion from using box driver For disassembly of Spin drum Others screwdriver nipper long nose pliers Common tools for servicing JIG for the ASSY SPIN BASKET ...

Page 12: ...s difficult to disassemble use the driver to disassemble hooks Be careful damage of hooks 4 Remove the 2 screws holding the control panel assembly and turn the panel over 5 Pull the Encoder Knob to separate it and then remove the 4 fixing screws When reassembling the PCB take care that you do not damage the control panel fixing hook After replacing the sub PCB check the key operation 6 Separate th...

Page 13: ...ion Water Valve 1 After separating the control panel separate the water valve housing 2 Remove the 3 fixing screws 3 Remove the wire harness and release the 2 clamps connecting the hoses When releasing the clamps take care that you do not tear the hoses ...

Page 14: ...12 _ Disassembly and Reassembly Part Figure Description Door Assembly 1 Remove the 2 inlay tapes 2 Remove the 4 screws holding the door lid TC and separate the door ...

Page 15: ... damage to the wire harness 4 Separate the main wire harness the pressure switch hose clip Grounding screw 5 Release the bleach hose clamp 6 Separate the top cover assembly by lifting and pushing ahead the top part of the assembly 7 you can check the door switch If turn the Top cover upside down Sensor Pressure Switch 1 Disassemble the control panel assembly 2 Separate the pressure switch housing ...

Page 16: ... Reassembly Part Figure Description Drain Pump 1 Separate the back cover 2 Separate 2 clamps 3 Remove the 13 screws in base 4 Remove the 3 screws 5 screws are separated by shape hand driver Thermistor 1 Remove the 2 screws ...

Page 17: ...bly 2 Remove the 2 screws holding the panel control Separate all the wires connected to the housing 3 Remove the 4 screws fixing the tub cover and separate the tub cover 4 Separate the pulsator cap by inserting the tip of a screwdriver between the pulsator cap and the pulsator and then lifting the screwdriver up 5 Remove the bolt holding the pulsator with a 10mm wrench ...

Page 18: ...ockwise direction 7 Place the main body so that the front frame faces upward and remove the 4 bolts holding the saddle with a 10mm wrench When you place the washer on the floor take care that you do not damage or scratch the product 8 Remove the bolt holding the DD motor housing with a 17mm wrench and then remove the motor housing 9 Remove the 6 bolts holding the DD motor with a 10mm wrench ...

Page 19: ...cription Clutch Assembly continued 10 Separate the 2 marked housings and then remove the DD motor 11 Press the hook to separate the housing 12 Separate the slide guide and the coupling by pulling them forward Disassemble the coupling and the spring ...

Page 20: ...assembly and Reassembly Part Figure Description 13 Remove the all screws fixing the clutch assembly and then separate the clutch assembly Reassembly procedures are in the reverse order of dissasembly procedures ...

Page 21: ...is not connected The DD motor cover is out of place The PCB housing terminal is not connected PBA fault DD motor fault This error occurs because of restrained revolutions This error occurs when an interference is generated due to too much laundry etc Water Supply Error 4C Foreign material is entering the water supply valve The water supply valve terminal is not connected Wire disconnected The warm...

Page 22: ...FI Module and main PBAs are not sensed because of commuication error Check The connector connections between The WIFI Module and main PBAs carefully Check for incorrect or loose connections etc Remove the WIFI Module and Check for any faulty soldering AC5 The signals between The LCD Module and main PBAs are not sensed because of commuication error Check The connector connections between The LCD Mo...

Page 23: ...ally because the water level detection does not work Because the drain hose is clogged and there is an injection error at a narrow section the water level detection does not work and water is supplied continually Water is supplied continually because of freezing or because there is foreign material in the water supply valve This error may occur when the water level sensor is degraded This error oc...

Page 24: ... Mems PBA or data error detected Check the wire connections Replace if necessary 1 Check the wire connections 2 Replace the Mems PBA 3 Main PBA wire connection error or PBA s silver nano part malfunction Replace if necessary 8C2 8C System Error SF1 Micro Controller Operation Fail Replace Assy PCB SF2 SF3 ...

Page 25: ...el sensor frequency 1 Check it after the water level sensor and the connector are connected Checking Part BlueColor Wire Oragne Color Wire 2 Frequency Approx 26 4 KHz without water Min 25 9KHz Check if the water level sensor terminal is properly connected Check if the water level sensor hose is broken This may occur when the main PCB is defective Washing Motor Defect 3C This may occur when the was...

Page 26: ...s may occur when the drain pump is defective Check if there is any alien substance inside the draining pump motor Check the natural drain in the same manner Check if there are any incorrect connections or broken wires If the machine malfunctions intermittently when the wash tub water temperature is high replace the pump If the motor stops due to the water being frozen in winter remove the frozen w...

Page 27: ...nit is inserted Check whether the door lock switch unit is damaged Check the disconnection of the wire If the door lock switch unit is defective replace it If the main PCB is defective replace it 3 Check the resistance for Lock Unlock Contact Checking Part Lock White Red Wire Unlock White Blue Wire Resistance Resistance Approx 0 2Ω between the terminals of Contact Check the Door Lock Unlock state ...

Page 28: ... the part assembly Unbalance Error UC This may occur due to the laundry being unevenly distributed Check the laundry type and check if the laundry load is unbalanced Make sure to check if there is any laundry present that absorbs a lot of water even if its volume is small and explain the problem comprehensively if necessary Mems PBA Detected 8C 8C1 8C2 This may occur due to disconnection Check wir...

Page 29: ... the floor is lower than the front level of the floor it can t be leveled Front Rear Only use the front legs to adjust the level Use the leg supports to adjust the level of the rear If the floor is on a steeply slope please use the additional leg supports Customer can purchase the leg supports from a service center ...

Page 30: ...DC Voltage It works to Change the AC to the DC 5 CE6 Charging Voltage Charge the DC LINK 300V Location Part No Function Description 6 IC1 Switching IC Making a stable DC 7 TE6 Trans Circuit Chopping the DC Link 8 SSR1 6 TRIAC1 2 Load Control Turn ON Off the Load Valve etc 9 Q5 RY2 Door Lock Switch Driving Circuit Drive the Door Lock Switch Toggle CW CCW 10 IC6 Driving Circuit Drive the SSR or Rela...

Page 31: ... 2 AC2 3 AC2 1 CN3 1 Motor_U 2 Motor_V 3 Motor_W CN9 1 5V 2 Hall_A 3 Hall_B 4 GND CN8 1 Door Lock Motor 2 Door Lock Motor 3 GND 4 Unlock Contact 5 Lock Contact 6 Reed Switch 7 5V_1 CN5 1 Water Level 2 Standby 3 TX 4 RX 5 Sub Reset 6 5V 7 GND 8 12V 9 Power On CN4 1 Bleach Valve WA456 2 Rinse Valve 3 Hot Valve 4 Cold Valve 5 Pump 6 N C 7 Mist Valve 8 Clutch ...

Page 32: ...ED Function 2 SW601 Jog Dial Jog Dial 3 CN802 Wash Communication Part Connect wash Main PBA 4 CN501 Conecting Sensing Part Connecting Thermistor cluch Water Lavel and Mems Sensor 5 LED LED Lamp Display Function 6 BZ601 Buzzer Making a sound 7 SW701 SW708 SW201 Switch Operating or changing Function 8 DSP701 LED Display Display Funciton 6 3 4 5 1 2 7 7 7 7 7 7 7 7 7 5 5 5 5 8 ...

Page 33: ...is Document can not be used without Samsung s authorization CN501 1 3 3 2 SPC_1 3 SDI_1 4 SDO_1 5 GND 6 CS1_1 7 GND 8 WATER_THERM 9 CLUTCH_SEN 10 WATER_SEN1 11 WATER_SEN2 12 5V 13 CLUTCH 14 15 GND CN802 1 CLUTH 2 WL_MAIN 3 STANDBY 4 TX 5 RX 6 RESET 7 5V 8 GND 9 12V 10 POWER_ON ...

Page 34: ...GRAM 6 1 WIRING DIAGRAM This Document can not be used without Samsung s authorization nREFERENCE INFORMATION BLK BLACK BLU BLUE GRN GREEN GRY GRAY NTR NATURAL ORG ORANGE PNK PINK RED RED SKYBLU SKYBLUE VIO VIOLET WHT WHITE YEL YELLOW ...

Page 35: ...e W A 4 8 H 7 4 0 0 A P A 2 Product type CAN NOT CHANGE Auto Washing machine SAMSUNG s Guide Line Market Claim Capacity 4 8 cu ft 48 4 5 cu ft 45 Feature Code F Intro Year 2013 H Intro Year 2014 J Intro Year 2015 A Project First launching region N America Feature logic 7 Grade High 4 Best Hot Cold water 0 Inverter Motor Drain Pump 0 STS Pulsator Color A N America P INOX Buyer A2 USA ...

Page 36: ...ervice Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law 2018 Samsung Electronics Co Ltd All rights reserved ...

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